Improvement in circulating tubular boilers



G. S. FAULKNER.

CIRCULATING TUBULAR Boum. No.17'8,517. Pazentea June 1a., 1876.

rllllll IlIllll GEORGE S. FAULKNER, OF INDIANAPOLIS, INDIANA.

IMPROVEMENT IN CIRCULATING TUBULAR BOILERS..

Specification forming part of Letters Patent No. K7S5A?, dated June 13, 1876; application filed April 24, 1876.

tities required; and my invention consists of inclosing the feed-water pipe entirely in larger pipes, and arranging` these pipes thuscombined in sections inside ofthe boiler-shell. Each section of these inclosed pipes is connected together at the bottom by crosspipe of sufficient size to receive water in the desired quantities to feed all the sections, and the last upright pipe in each section yis connected with the steam-spacev of the boiler, so

vthat all steam generated in the sections of pipes arranged in the fire-box is conducted into the steam-space of theboiler for rapid use. n I am aware that previous to my invention there have been constructed instantaneous generators,`or a form of steam-boiler-similar in some respects to my invention. These instantaneous generators differ from ordinary boilers, and also from my invention, in construction and mode ot' operation. In th'e iirst place, theydift'er from the ordinary steam-boiler -because there is no unvaporized water in thel boiler, and in most cases where these instantaneous generators are used there is no steam-chest employed, and the object sought for has been to inject at times a sufficient quantity of steam for one impulse of the piston, which was accomplished by iiashing ajet of water instantly into steam. In order to accomplish these results the steam-generator is formed similar in some respects to my invention. I have referred to the patent of Dr. Alban, ot' Mecklenburg, patented in 1825, in which the steam was generated in a' series of strong vertical tubes, which were submerged in a bath of molten lead. The row of verti cal tubes or pipes was attached to a crosspipe, and above and outside of this cross-pipe was located the water-supply pipe, by means of which thewater was supplied to the inside vertical pipes located inside of the other pipes, either heated by the bath of lead or by fire, and the water thus injected was instantly dashed-into steam for the purpose required; and such an arrangement of parts and such results produced I do notclaim, as they are old.

In the drawing, Figure l represents a cross-section of a steam lire-engine boiler, taken near the top, embodying my improveY ment. Fig. 2 is a vertical section of the same. Fig. 3 represents an enlarged sectional view ot' the arrangement of pipes as used in the apparatus.

A represents the inner annular shell of the boiler. A' represents` the outside annular shell, and between these two shells there is an'annular water and steam space. At the bottom of the boiler is arranged a set of gratebars, K, and at the top of the boiler is the smoke-stack H, all arranged substantially as shown and described. On'the inside of the boiler, above the tire-chamber J, are arranged a series of rows of vertical tubes or pipes, O, which are insertedat the bottom in the connectin g-pipe B. The upper ends ofeach of these vertical tubes are provided with a cap, C', which closes the ends of the tubes O completely. All ot' these tubes O are thus capped, except the last one in each row, which is made longer than the rest, and is connected at the top B to the steam-space, between the two shells A A of the boiler', as shown. On the inside of the lower connecting-pipe B of each section is arranged the water-conducting pipe G, which has also branch tubes F, which extend up inside of the outer vertical tubes C, as shown in Figs. 2 and 3, and to each pipe G, in each section B, there is inserted a pipe, F,

Vwhich extends downward into a cross supplywater from the pump, by means of the pipe D',

to each set of vertical pipes F, in the manner shown. Here it will be seen. that the Water is forced into pipe D in the direction of .the arrow a, and iills the cross-pipe D under the row of vertical tubes. The water is then forced into cach pipe Gr of each section by means of the pipe F', and is then conveyed up the vertical pipes F, where it is allowed to become vaporized in its passage out of the tubes F and downl the outer tubes C, and the lower connecting-pipe B conveys the steam thus.

generated into the steam-space between the shells A Al of the boiler by means of the last tube B ot'each row of vertical tubes, as shown. Thelower part of the space inclosed between the shells A A is occupied with water above the point Where the tire in the tire-box would be liable to burn the inner shell, and is to be always kept in this condition, and water is supplied to this space by means ofthe pump, and is there heated, andis then taken from the space between the shells, and forced into the series of rows of vertical tubes, in the manner described; or cold water may be introduced into the vertical tubes, and into the annular space between the shells, if so required.

The tire in the tire-box J has a free circulation upward, and envelops all the outer tubes B G in fiume, and consequently the watertubes become intensely heated; and as the small streams ot water that are constantly pouring out ot' the upper ends of the inner vertical tubes F come in contact with these heated surfaces,thc wateris vaporized, and the outside pipes are only conveying the vapor thus generated to the steam-space of the boiler, andthe pipes .or tubes B G are prevented from being burned by the rapid circulation of the steam and water which is passing;` through them.

I do not broadly claim the outside Vertical tubes C and inner vertical tubes F, as they are old; but

What I claim as new, and wish to secure by Letters Patent, is-

l. In boilers, the combination ot' the connecting-pipe B, vertical outside pipes C, caps C', arranged in rows, and united together by means of the lower cross-pipe D, and eachl row of pipes C connected by the extended pipe B to the steam-space between the shells A A, in the mannershown, forthe purposes set forth and described.

2. In boilers, the water-pipes G, inclosed in the outer pipes or tubes B, and provided with vertical water-tubes F, extending up inside of the outside vertical tubes C, the main supplypipes F connecting the pipes G with the main supply-pipe D, in the manner shown, for Athe purposes set forth and described.

In testimony whereof I have signed myy name to this specification in the presence of two subscribing witnesses.

GEORGE S. FAULKNER.

Witnesses:

E. O. FRINK, II. W. CooK. 

